Xi1 Centauri

ξ1 Centauri
Location of ξ1 Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Centaurus
Right ascension 13h 03m 33.305s
Declination −49° 31′ 38.15″
Apparent magnitude (V) +4.83
Characteristics
Evolutionary stage Main sequence
Spectral type A0 V
U−B color index +0.014
B−V color index +0.030
Astrometry
Radial velocity (Rv)0.00±3.70 km/s
Proper motion (μ) RA: −47.858 mas/yr
Dec.: −11.496 mas/yr
Parallax (π)14.8276±0.1073 mas
Distance220 ± 2 ly
(67.4 ± 0.5 pc)
Absolute magnitude (MV)+0.68
Details
Mass2.39 M☉
Radius2.7 R☉
Luminosity43.2 L☉
Surface gravity (log g)4.11±0.14 cgs
Temperature10,462±356 K
Rotational velocity (v sin i)185 km/s
Age125 Myr
Other designations
ξ1 Cen, CD−48° 7887, HD 113314, HIP 63724, HR 4933, SAO 223870
Database references
SIMBADdata
ξ1 Cen is the brightest star in the picture, at the right of the galaxy NGC 4945.

Xi1 Centauri is a solitary star in the southern constellation of Centaurus. Its name is a Bayer designation that is Latinized from ξ1 Centauri, and abbreviated Xi1 Cen or ξ1 Cen. This star is visible to the naked eye with an apparent visual magnitude of +4.83. With an annual parallax shift of 14.83 mas, it is located around 220 light years from the Sun. At that distance, the apparent visual magnitude of the star is diminished by an interstellar extinction factor of 0.10 due to intervening dust. Just 17 arc minutes to the east of Xi1 Centauri lies the galaxy NGC 4945.

This is an A-type main sequence star with a stellar classification of A0 V. It is about 125 million years old with a relatively high rate of spin, having a projected rotational velocity of 185 km/s. The star has an estimated 2.4 times the mass of the Sun and about 2.7 times the Sun's radius. It is radiating 43 times the solar luminosity from its outer atmosphere at an effective temperature of 10,462 K.

References

  1. 1 2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023), "Gaia Data Release 3. Summary of the content and survey properties", Astronomy and Astrophysics, 674: A1, arXiv:2208.00211, Bibcode:2023A&A...674A...1G, doi:10.1051/0004-6361/202243940, S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 Gutierrez-Moreno, Adelina; Moreno, Hugo (June 1968), "A photometric investigation of the Scorpio-Centaurus association", Astrophysical Journal Supplement, 15: 459, Bibcode:1968ApJS...15..459G, doi:10.1086/190168.
  4. 1 2 Bauwens, E. K. J.; et al. (2010), "Candidate Calibrators for the In-Orbit Spectrophotometric Calibration of the MIRI Medium Resolution Spectrograph Onboard the James Webb Space Telescope", in Deustua, Susana; Oliveira, Cristina (eds.), The 2010 STScI Calibration Workshop (PDF), Space Telescope Science Institute, retrieved 2016-01-10.
  5. ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  6. 1 2 3 4 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
  7. 1 2 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (3rd ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  8. 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
  9. 1 2 Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory, University of Kyoto, Bibcode:1970crvs.book.....U.
  10. ↑ "ksi01 Cen", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2017-01-09.
  11. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  12. ↑ Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
  13. ↑ O'Meara, Stephen James (2016), Deep-Sky Companions: The Caldwell Objects (2nd ed.), Cambridge University Press, p. 392, ISBN 978-1316033531.